Thermal modification and technological characteristics of wood of Eucalyptus cloeziana
DOI:
https://doi.org/10.4336/2017.pfb.37.90.1288Keywords:
Dimensional stability, Thermal treatment, Wood qualityAbstract
The genera Eucalyptus is widely used by Brazilian industries. Nonetheless some concerns still persist regarding some of its technological properties. Aiming the improvement of the wood properties the heat treatment is being largely employed in Brazil. The objective of this research was to study the effect of heat treatment on physical and mechanical properties of Eucalyptus cloeziana. We sampled 5 trees with 21 years from which we used the first two logs with length of 3 m each. Heat treatment of 160 and 210 °C were applied for 1 h. The evaluate physical properties were equilibrium moisture content, mass reduction, loss of density, total swelling coefficient (linear and volumetric) and coefficient of anisotropy. The determination of the mechanical strength came through the test of maximum resistance to impact. There was a reduction of the material mass after application of the temperatures. The other evaluated physical properties indicate that the heat treatment was effective in increasing dimensional stability of species, especially under the temperature of 210 °C. However, the resistance to impact was drastically affected by temperature increasing.Downloads
References
American Society for Testing and Materials. ASTM D143: Standard Test Methods for small clear specimens of timber. West Conshohocken, 2000.
Anuário estatístico ABRAF 2013: ano base 2012. Brasília, DF, 2013. 148 p. Disponível em: <http://www.ipef.br/estatisticas/relatorios/anuario-ABRAF13-BR.pdf>. Acesso em: 26 dez. 2016.
Araújo, S. O. et al. Propriedades de madeiras termorretificadas de Eucalyptus grandis e SP. Scientia Forestalis, v. 40, n. 95, p. 327-336, 2012.
Associação Brasileira de Normas Técnicas. NBR 7190: projetos de estruturas de madeira. Rio de Janeiro, 1997.
Bakar, B. F. A. et al. Properties of some thermally modifies wood species. Materials and Design, v. 43, p. 348-355, 2013. DOI: 10.1016/j.matdes.2012.06.054.
Batista, D. C. et al. Efeito do tempo e temperatura de modificação térmica na redução do inchamento máximo da madeira de Eucalyptus grandis Hill ex Maiden. Ciência Florestal, v. 21, n. 3, p. 533-540, 2011. DOI: 10.5902/198050983810.
Conte, B. et al. Propriedades físicas e colorimétricas da madeira termorretificada de Pinus elliottii var. elliottii. Scientia Forestalis, v. 42, n. 104, p. 555-563, 2014.
De Moura, L. F. et al. Efeitos da termorretificação na perda de massa e propriedades mecânicas de Eucalyptus grandis e Pinus caribaea var. hondurensis. Floresta, v. 42, n. 2, p. 305-314, 2012. DOI: 10.5380/rf.v42i2.17635.
Dilik, T. & Hiziroglu, S. Bending strength of heat treated compressed Eastern redcedar wood. Materials and Design, v. 42, p. 317-320, 2012. DOI: 10.1016/j.matdes.2012.05.050.
Dubey, M. K. et al. Changes in chemistry, color, dimensional stability and fungal resistance of Pinus radiata D. don wood with oil heattreatment. Holzforschung, v. 66, n. 1, p. 49, 2012. DOI: 10.1515/ HF.2011.117.
Dubey, M. K. Improvements in stability, durability and mechanical properties of radiata pine wood after heat-treatment in a vegetable oil. 2010. 211 f. (Doutorado) - Universidade de Canterbury, Canterbury.
Esteves, B. et al. Influence of steam heating on the properties of pine (Pinus pinaster) and eucalypto (Eucalyptus globulus) wood. Wood Science and Technology, v. 41, n. 3, p. 193-207, 2007. DOI: 10.1007/s00226-006-0099-0.
Gündüz, G. et al. The effects of heat treatment on physical and technological properties and surface roughness of Camiyani Black Pine (Pinus nigra Arn. subsp. pallasiana var. pallasiana) wood. Bioresource Technology, v. 99, n. 7, p. 2275-2280, 2008. DOI: 10.1016/j.biortech.2007.05.015.
Kasemsiri, P. et al. Characterization of heat treated Eastern red cedar (Juniperus virginiana L.). Journal of Materials Processing Technology, v. 212, p. 1324-1330, 2012. DOI: 10.1016/j.jmatprotec.2011.12.019.
Kocaefe, D. et al. Effect of thermal treatment on the chemical composition and mechanical properties of birch and aspen. BioResources, v. 3, n. 2, p. 517-537, 2008.
Menezes, W. M. et al. Modificação térmica nas propriedades físicas da madeira. Ciência Rural, v. 44, p. 1019-1024, 2014. DOI: 10.1590/S0103-84782014000600011.
Modes, K. S. et al. Efeito da termorretificação nas propriedades mecânicas das madeiras de Pinus taeda e Eucalyptus grandis. Ciência Florestal, v. 27, n. 1, p. 291-302, 2017. DOI: 10.5902/1980509826467.
Navi, P. & Sandberg, D. Thermo-hydro-mechanical wood processing. Boca Raton: CRC Press, 2012. 280 p.
Oliveira, J. T. S. & Silva, J. C. Variação radial da retratibilidade e densidade básica da madeira de Eucalyptus saligna Sm. Revista Árvore, v. 27, n. 3, p. 381-385, 2003. DOI: 10.1590/S0100-67622003000300015.
Poubel, D. D. S. et al. Efeito da termorretificação nas propriedades físicas e químicas da madeira de Pinus caribaea. Cerne, n. 3, p. 391-398, 2013. DOI: 10.1590/S0104-77602013000300005.
Unsal, O. & Ayrilmis, N. Variations in compression strength and surface roughness of heat-treated Turkish river red gum (Eucalyptus camaldulensis) wood. Journal Wood Science, v. 51, n. 4, p. 405-409, 2005. DOI: 10.1007/s10086-004-0655-x.
Downloads
Published
How to Cite
Issue
Section
License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
The BRAZILIAN JOURNAL OF FORESTRY RESEARCH reserves the right to correct grammar, improve clarity, and impose PFB standard although respecting the author's style.
Final proof version will be sent to the correspondence author.
Published papers will become property of the BRAZILIAN JOURNAL OF FORESTRY RESEARCH.
Published papers may be used by the authors, without previous PFB authorization, allowed when source is cited.
Any mention of trademarks or methods do not imply in its recommended by the Editorial Committee.
The authors are the exclusive responsible for opinions and concepts developed in the manuscript.
Os originais publicados na Pesquisa Florestal Brasileira estão disponibilizados de acordo com uma Licença 